Private equity firm Catalyst Capital Group Inc. is offering to purchase up to $150 million (US$114 million) worth of shares of Hudson’s Bay Co. ( HBC.TO ) as it builds a stake in the Canadian retailer in an effort to thwart a proposed takeover of the company. The Toronto-based firm said in a statement Monday it was was prepared to pay $10.11 per share in cash for up to roughly 14.8 million common shares...